Add mock function for objects

[sz-piotr]

Resolves L2B-1025

[linear[bot]]

L2B-1025 Add `mock` from our codebase as part of earl

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: a5b7361c4dfcb215538a8679d74f19cf1c55265b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------ | ----- | | earljs | Minor |

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Name	Status	Preview	Updated
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